From the first Reynolds avoided making copies, and had refused lucrative orders. He sketched portions of pictures, such as he thought would help his own comprehension, but he would do no slavish imitation. "The man of true genius," writes Sir Joshua, "instead of spending all his hours, as many artists do while they are at Rome, in measuring statues and copying pictures, soon begins to think for himself, and endeavour to do something like what he sees. I consider general copying," he adds, "as a delusive kind of industry: the student satisfies himself with the appearance of doing something; he falls into the dangerous habit of imitating without selecting, and labouring without a determinate object; as it requires no effort of mind, he sleeps over his work, and those powers of invention and disposition which ought particularly to be called out and put into action lie torpid, and lose their energy for want of exercise. How incapable of producing anything of their own those are who have spent most of their time in making finished copies, is an observation well known to all those who are conversant with our art." His own precise method of study is not known, but it may be assumed that he was chiefly occupied in reasoning on what he observed. Elsewhere he writes--"A painter should form his rules from pictures rather than from books or precepts; rules were first made from pictures, not pictures from rules. Every picture an artist sees, whether the most excellent or the most ordinary, he should consider whence that fine effect or that ill effect proceeds, and then there is no picture ever so indifferent but he may look at it to his profit." "The artist," he observes, "who has his mind filled with ideas, and his hand made expert by practice, works with ease and readiness; whilst he who would have you believe that he is waiting for the inspirations of genius, is in reality at a loss how to begin, and is at last delivered of his monsters with difficulty and pain. The well-grounded painter, on the contrary, has only maturely to consider his subject, and all the mechanical parts of his art will follow, without his exertion." The mode of study which Sir Joshua adopted himself he continually recommends to the students: "Instead of copying the touches of those great masters, copy only their conceptions; instead of treading in their footsteps, endeavour only to keep the same road; labour to invent on their general principles and way of thinking; possess yourself with their spirit; consider with yourself how a Michael Angelo or a Raffaelle would have treated this subject, and work yourself into a belief that your picture is to be seen and criticised by them when completed; even an attempt of this kind will raise your powers.