Seneca

Life is divided into three periods, past, present and future. Of these, the present is short, the future is doubtful, the past is certain.

nevertheless it wins our attention by reason of the attractiveness of an empty subject.

life, if you know how to use it, is long.

It takes the whole of life to learn

it takes the whole of life to learn how to die

so there is no reason for you to think that any man has lived long because he has grey hairs or wrinkles; he has not lived long—he has existed long.

ld age surprises them while their minds are still childish, and they come to it unprepared and unarmed, for they have made no provision for it;

Old age surprises them while their minds are still childish, and they come to it unprepared and unarmed, for they have made no provision for it;

nevertheless it wins our attention by reason of the attractiveness of an empty subject.

not that we have a short space of time, but that we waste much of it.