The teaching of "the practice of the presence of God" by Brother Lawrence seems very simple to follow and very easy to do. After all, did he not succeed in it for upwards of forty years? But let us remember that he combined it with merely mechanical kitchen work. It did not and could not distract him from carrying out his tasks. But to combine it with intellectual desk work is quite another matter. Obviously this is far more difficult than combining it with simple manual labour.
-- Notebooks Category 23: Advanced Contemplation > Chapter 6: Advanced Meditation > # 230