Magnus, known as Albert the Great and Albert of Cologne
Dominican Friar and Bishop
Happy is the man who, by continually effacing all images and through introversion and the lifting up of his mind to God, at last forgets and leaves behind all such hindrances... If, therefore, thou desirest a safe stair and short path to arrive at the end of true bliss, then, with an intent mind, earnestly desire and aspire after continual cleanness of heart and purity of mind. Add to this a constant calm and tranquillity of the senses, and a recollecting of the affections of the heart, continually fixing them above. Work to simplify the heart, that being immovable and at peace from any invading vain phantasms... Thus continue, until thou becomest immutable and dost arrive at any vicissitude of space or time, reposing in that inward quiet and secret mansion of the deity.