D’Artagnan: Why is Athos sitting by himself? Aramis: He takes his drinking very seriously. Not to worry, he’ll be his usual charming self by morning.

What would you not have accomplished if you had been free?" "Possibly nothing at all; the overflow of my brain would probably, in a state of freedom, have evaporated in a thousand follies; misfortune is needed to bring to light the treasures of the human intellect. Compression is needed to explode gunpowder. Captivity has brought my mental faculties to a focus; and you are well aware that from the collision of clouds electricity is produced — from electricity, lightning, from lightning, illumination.

I know what happiness and what despair are, and I never make a jest of such feelings. Take it, then, but in exchange —

We’ll go where the air is pure, where all sounds are soothing, where, no matter how proud one may be, one feels humble and finds oneself small- in short, we’ll go to the sea. I love the sea as one loves a mistress and I long for her when I haven’t seen her for some time

Those born to wealth, and who have the means of gratifying every wish, know not what is the real happiness of life, just as those who have been tossed on the stormy waters of the ocean on a few frail planks can alone realize the blessings of fair weather.

Never fear quarrels, but seek hazardous adventures.

He's right: They have to put madmen with madmen.