Meditations 9.32

Thou canst remove out of the way many useless things among those which disturb thee, for they lie entirely in thy opinion; and thou wilt then gain for thyself ample space by comprehending the whole universe in thy mind, and by contemplating the eternity of time, and observing the rapid change of every several thing, how short is the time from birth to dissolution, and the illimitable time before birth as well as the equally boundless time after dissolution!

Marcus Aurelius, Meditations 9.32, translated by George Long

It is in thy power to rid thyself of many unnecessary troubles, for they exist wholly in thy imagination. Thou wilt at once set thy feet in a large room by embracing the whole Universe in thy mind and including in thy purview time everlasting, and by observing the rapid change in every part of everything, and the shortness of the span between birth and dissolution, and that the yawning immensity before birth is only matched by the infinity after our dissolution.

Marcus Aurelius, Meditations 9.32, translated by C. R. Haines