"Remember always that lack of calm in the daily life prevents the teachers on egoic levels from reaching you. Endeavor therefore to remain quiescent as life unrolls, work, toil, strive, aspire, and hold the inner calm. Withdraw steadily into interior work and so cultivate a responsiveness with the higher planes. A perfect steadiness of inner poise is what the Masters need in those whom They seek to use."
January 1, 1970
https://en.wikiquote.org/wiki/A_Treatise_on_White_Magic