427 (selections I).

I can feel nothing but compassion for those who sincerely lament their doubt, who regard it as the ultimate misfortune, and who, sparing no effort to escape from it, make their search their principal and most serious business.
But as for those who spend their lives without a thought for this final end of life and who, solely because they do not find within themselves the light of conviction, neglect to look elsewhere, and to examine thoroughly whether this opinion is one of those which people accept out of credulous simplicity or one of those which, though obscure in themselves, none the less have a most solid and unshakeable foundation: as for them, I view them very differently.
This negligence in a matter where they themselves, their eternity, their all are at stake, fills me more with irritation than pity; it astounds and appals me; it seems quite monstrous to me. I do not say this prompted by the pious zeal of spiritual devotion. I mean on the contrary that we ought to have this feeling from principles of human interest and self-esteem. For that we need only see what the least enlightened see.

427 (selections II).

One needs no great sublimity of soul to realize that in this life there is no true and solid satisfaction, that all our pleasures are mere vanity, that our affections are infinite, and finally that death which threatens us at every moment must in a few years infallibly face us with the inescapable and appalling alternative of being annihilated or wretched throughout eternity.
Nothing could be more real, or more dreadful than that. Let us put on as bold a face as we like: that is the end awaiting the world's most illustrious life. Let us ponder these things, and then say whether it is not beyond doubt that the only good thing in this life is the hope of another life, that we become happy only as we come nearer to it, and that, just as no more unhappiness awaits those who have been quite certain of eternity, so there is no happiness for those who have no inkling of it.
It is therefore quite certainly a great evil to have such doubts, but it is at least an indispensable obligation to seek when one does thus doubt; so the doubter who does not seek is at the same time very unhappy and very wrong.

427 (selections III).

Now what advantage is it to us to hear someone say he has shaken off the yoke, that he does not believe that there is a God watching over his actions, that he considers himself sole master of his behaviour, and that he proposes to account for it to no one but himself? Does he think that by so doing he has henceforth won our full confidence, and made us expect from him consolation, counsel and assistance in all life's needs? Do they think that they have given us great pleasure by telling us that they hold our soul to be no more than wind or smoke, and saying it moreover in tones of pride and satisfaction? Is this then something to be said gaily? Is it not on the contrary something to be said sadly, as being the saddest thing in the world?

427 (selections IV).

There is no surer sign of extreme weakness than the failure to recognize the unhappy state of a man without God; there is no surer sign of an evil heart than failure to desire that the eternal promises be true; nothing is more cowardly than to brazen it out with God. Let them then leave such impiety to those ill-bred enough to be really capable of it; let them at least be decent people if they cannot be Christians; let them, in short, acknowledge that there are only two classes of persons who can be called reasonable: those who serve God with all their heart because they know him and those who seek him with all their heart because they do not know him.

908.

Some fear to lose [God], others to find him.

152.

Between us and heaven or hell there is only life half-way, the most fragile thing in the world.

449. (selections)

It teaches men then these two truths alike: that there is a God, of whom men are capable, and that there is a corruption in nature which makes them unworthy. It is of equal importance to men to know each of these points: and it is equally dangerous for man to know God without knowing his own wretchedness as to know his own wretchedness without knowing the Redeemer who can cure him. Knowing only one of these points leads either to the arrogance of the philosophers, who have known God but not their own wretchedness, or to the despair of the atheists, who know their own wretchedness without knowing their Redeemer.
And thus, as it is equally necessary for man to know these two points, so it is equally merciful of God to have let us know them. The Christian religion does so, and it consists indeed of this.

II.

Thou gavest me health to serve thee, and I made a profane use of it. Thou sendest me sickness now to correct me: suffer not that I use it to irritate thee by my impatience. I made a bad use of my health, and thou hast justly punished me for it. Suffer not that I make a bad use of my punishment. And since the corruption of my nature is such that it renders thy favors pernicious to me, grant, O my God! that thy all-powerful grace may render thy chastisements salutary. If my heart was full of affection for the world while it retained its vigor, destroy this vigor for my salvation; and render me incapable of enjoying the world, either through weakness of body or through zeal of charity, that I may enjoy but thee alone.

I.

LORD, whose spirit is so good and so gentle in all things, and who art so merciful that not only the prosperity but the very disgrace that happens to thy elect is the effect of thy mercy, grant me the favor not to act towards me as towards a heathen in the condition to which thy justice has reduced me: that like a true Christian I may recognize thee for my Father and my God, in whatever condition I may find myself, since the change of my condition brings none to thine; as thou art always the same, however subject I may be to change, and as thou art none the less God when thou afflictest and punishest, than when thou comfortest and showest indulgence.