Assume you have 90 seconds with a new user before they decide to use your app or delete it.

It is hard to fail, but it is worse never to have tried to succeed.

Sow a thought, reap an action; sow an action, reap a habit; sow a habit, reap a character; sow a character, reap a destiny.

If you’re not living life on the edge, you’re taking up too much space.

Most great people have attained their greatest success just one step beyond their greatest failure.

Fall seven times and stand up eight.

The critical ingredient is getting off your butt and doing something. It’s as simple as that. A lot of people have ideas, but there are few who decide to do something about them now. Not tomorrow. Not next week. But today. The true entrepreneur is a doer not a dreamer.

Don't waste your life in doubts and fears: Spend yourself on the work before you, well assured that the right performance of this hour's duties will be the best preparation for the hours or ages that follow it.

Never, never, never, never, in nothing great or small, large or petty, never give in except to convictions of honour and good sense. Never yield to force; never yield to the apparently overwhelming might of the enemy.

The whole problem with the world is that fools and fanatics are always so certain of themselves, but wiser people so full of doubts.

The more difficulties one has to encounter, within and without, the more significant and the higher in inspiration his life will be.

When everything seems to be going against you, remember that the airplane takes off against the wind, not with it.