The meaning of "tolerance" in a medical context is illuminating:

"...the immunological state marked by unresponsiveness to a specific toxin or other foreign substance which induces an immune response in the body, especially the production of antibodies..."

So it begins

Be careful about your media diet. What you take in will influence you. Try to not overconsume things that are demoralizing or promoting toxicity. Try to consume more things that life you up and encourage a better life.

A man's worth is determined by his ability to keep cool in stressful situations.

Learn not to lose your shit at every little thing that goes wrong. Life crushes sensitive men without mercy.

A man's worth is determined by his ability to work hard when he doesn't feel like it.

“The brave person shares only the good with others, he keeps the worst to himself and suffering is a private matter.”

Peter Rosegger

Life isn't fair.

Make the best of your situation rather than lament the fact some people are born richer, smarter, or better looking than you.

Don't care about what you can't control.

Pointless and inefficient.

Maximise your roll of the dice, and stop worrying about others.