Seneca

“ Can one, do you think, despise death with a care-free countenance, or with a "blithe and gay" expression, as our young dandies are accustomed to say? Or can one thus open his door to poverty, or hold the curb on his pleasures, or contemplate the endurance of pain? ”

“ The frail body, also, even though we can accomplish nothing without it, is to be regarded as necessary rather than as important; it involves us in vain pleasures, short-lived, and soon to be regretted, which, unless they are reined in by extreme self-control, will be transformed into the opposite. This is what I mean: pleasure, unless it has been kept within bounds, tends to rush headlong into the abyss of sorrow.
But it is hard to keep within bounds in that which you believe to be good. The real good may be coveted with safety. 7. Do you ask me what this real good is, and whence it derives? ”

“ Do you ask what is the foundation of a sound mind? It is, not to find joy in useless things. ”

“ For men who leap from one purpose to another, or do not even leap but are carried over by a sort of hazard, – how can such wavering and unstable persons possess any good that is fixed and lasting? 8. There are only a few who control themselves and their affairs by a guiding purpose; the rest do not proceed; they are merely swept along, like objects afloat in a river. And of these objects, some are held back by sluggish waters and are transported gently; others are torn along by a more violent current ”

“ It is because the life of such persons is always incomplete. But a man cannot stand prepared for the approach of death if he has just begun to live. We must make it our aim already to have lived long enough. No one deems that he has done so, if he is just on the point of planning his life. ”

“ Some men, indeed, only begin to live when it is time for them to leave off living. And if this seems surprising to you, I shall add that which will surprise you still more: Some men have left off living before they have begun. ”

“ Therefore I pray you, my dearest Lucilius, do the one thing that can render you really happy: cast aside and trample under foot all those things that glitter outwardly and are held out to you [2] by another or as obtainable from another; ”