Rudolf Steiner: inward restfulness

 "................ Whatever the next hour or day may bring me, I cannot change it by fear or anxiety, for it is not yet known.  I will therefore wait for it with complete inward restfulness, perfect tranquility of mind. "

Anyone who can meet the future in this calm, relaxed way, without impairing his active strength and energy, will be able to develop the powers of the soul freely and intensively. 
It is as if hindrance after hindrance fall away, as the soul becomes more and more pervaded by this feeling of humbleness towards approaching events.

Rudolf Steiner in Metamorphosis of the Soul, Vol 2