Spurgeon on time off

In the lecture to his students entitled, 'The Minsiter's Fainting Fits' Spurgeon writes:

‘Rest time is not waste time.  It is economy to gather fresh strength.’
‘It is wisdom to take occasional furlough.’
‘In the long run, we shall do more by sometimes doing less.’ 
‘Let no tender conscience doubt the lawfulness of going out of harness for awhile, but learn from the experience of others the necessity and duty of taking timely rest.'