"Taken together, evidence continues to recommend practice that is scheduled throughout a learning event rather than concentrated in one time or place." - Ruth Clark and Richard E. Mayer, E-Learning and the Science of Instruction.
While these quotes aren't necessarily related to eLearning development, I trust that you will find this small and carefully curated collection of quotes both inspiring and enriching.
“You are more powerful than you think you are. Act accordingly.” — Seth Godin
“If the person you are talking to doesn't appear to be listening, be patient. It may simply be that he has a small piece of fluff in his ear.” — A.A. Milne, Winnie-the-Pooh
"A majority of life's errors are caused by forgetting what one is really trying to do." — Charlie Munger
Remarkable training can produce remarkable results... both for your people and your bottom line.
"Almost everything will work again if you unplug it for a few minutes, including you." — Anne Lamott