That part of the air which is nearest to the wing which presses on it, will have the greatest density. - Leonardo da Vinci

Just as a well-filled day brings blessed sleep, so a well-employed life brings a blessed death

Amid the vastness of the things among which we live, the existence of nothingness holds the first place; its function extends over all things that have no existence, and its essence, as regards time, lies precisely between the past and the future, and has nothing in the present. This nothingness has the part equal to the whole, and the whole to the part, the divisible to the indivisible; and the product of the sum is the same whether we divide or multiply, and in addition as in subtraction; as is proved by arithmeticians by their tenth figure which represents zero; and its power has not extension among the things of Nature.

In rivers, the water that you touch is the last of what has passed and the first of that which comes: so with time present.