Our memory is like a sieve, the holes of which in time get larger and larger; the older we get, the quicker anything intrusted to it slips from the memory, whereas what was fixed fast in it in early days is there still. Arthur Schopenhauer
Memory like books that remain a long time shut up in the dust needs to be opened from time to time; it is necessary, so to speak, to open the leaves, that it may be ready in time of need. Seneca