Sri Aurobindo
Letters of Sri Aurobindo
Volume IV - Part 3
Fragment ID: 14671
It must be the want of sleep that keeps your nervous system exposed to weakness – it is a great mistake not to take sufficient sleep. 7 hours is the minimum needed. When one has a very strong nervous system, one can reduce it to 6, sometimes even 5 – but it is rare and ought not to be attempted without necessity.