From chapter 3 in The Art of Learning
When we’re in a learning phase, we often feel weak, exhausted or hopeless, and this is something we can also experience physically. A boxer with a great right hand but a weak left hand will take plenty of punches and go through some tough rounds while learning to use his left side more skillfully. Although learning through trial, error and slow improvement is tough, we should be careful not to doubt ourselves. This can quickly lead to a downward spiral, in which we berate ourselves for every mistake, and the possibility of achieving our goals seems to shrink at every turn.
An idea I didn’t take to heart while learning Chinese, what a trial that was, but am trying to while I gain some rudimentary skills in programming with Swift.