A worker may be the hammer's master, but the hammer still prevails. A tool knows exactly how it is meant to be handled, while the user of the tool can only have an approximate idea.
Milan KunderaThe day after his father left, Franz and his mother went into town together, and as they left home Franz noticed that her shoes did not match. He was in a quandary: he wanted to point out the mistake, but was afraid he would hurt her. So, during the two hours they spent walking through the city together he kept his eyes focused on her feet. It was then he had his first inkling of what it means to suffer.
Milan Kundera