CNN has obtained the letter Barack Obama left for Donald Trump on Inauguration Day in January. Obama congratulated Trump on his "remarkable run" and then offered four pieces of advice.

1. Recognize that they've been fortunate, and "build ladders of success" for others.
2. Appreciate that the wealth and safety of much of the world depends on American leadership.
3. Guard institutions like the rule of law and civil liberties and leave them "at least as strong as we found them."
4. Make time for friends and family.

Read the full letter.