Marcus Aurelius
Meditations 6.18
How strangely men act! They will not praise those who are living at the same time and living with themselves; but to be themselves praised by posterity, by those whom they have never seen nor ever will see, this they set much value on. But this is very much the same as if thou shouldst be grieved because those who have lived before thee did not praise thee.
Marcus Aurelius, Meditations 6.18, translated by George Long
What a way to act! Men are chary of commending their contemporaries and associates, while they themselves set great store by the commendation of posterity, whom they have never seen or shall see. But this is next door to taking it amiss that thy predecessors also did not commend thee.
Marcus Aurelius, Meditations 6.18, translated by C. R. Haines