Patient endurance is the fruit of love, for “love patiently accepts all things” (1 Corinthians 13:7)….
A great teacher has said that after the fall our inner being naturally adapts itself to outward forms. When, then, someone is striving to concentrate his intellect in himself so that it functions, not according to the direct form of movement but according to the circular, delusion-free form, how could he not gain immensely if, instead of letting his gaze flit hither and thither, he fixes it upon his chest or his navel as upon a point of support? Outwardly curling himself–so far as is possible–into the form of a circle, in conformity with the mode of action that he tries to establish in his intellect, he also, through this same position of his body, sends into his heart the power of the intellect that is dispersed outwardly when his gaze is turned outward.
~St Gregory Palamas (Philokalia, vol.4, p.338)