Below is a passage from Samuel Johnson's Rasselas. The speaker is talking about his decision to be a poet and the changes that entailed. I post it here because he is talking about sharpening both his diffuse and focused attention, a skill and habit that would benefit any lawyer, photographer, or person seeking increased mindfulness.
Being now resolved to be a poet, I saw every thing with a new purpose; my sphere of attention was suddenly magnified: no kind of knowledge was to be overlooked. I ranged mountains and deserts for images and resemblances, and pictured upon my mind every tree of the forest and flower of the valley. I observed with equal care the crags of the rock and the pinnacles of the palace. Sometimes I wandered along the mazes of the rivulet, and sometimes watched the changes of the summer clouds. To a poet nothing can be useless. Whatever is beautiful, and whatever is dreadful, must be familiar to his imagination: he must be conversant with all that is awfully vast or elegantly little. The plants of the garden, the animals of the wood, the minerals of the earth, and meteors of the sky, must all concur to store his mind with inexhaustible variety: for every idea is useful for the inforcement or decoration of moral or religious truth; and he, who knows most, will have most power of diversifying his scenes, and of gratifying his reader with remote allusions and unexpected instruction.
All the appearances of nature I was therefore careful to study, and every country which I have surveyed has contributed something to my poetical powers.
Image note: Composite I created of several photos.