What is the message of the poem IF written by Rudiyard Kipling?

The poem makes you feel inspired to do your best because the poem tells you never to give up even if you find things difficult. It contains multiple messages, e.g.,
• believe in yourself;
• be patient;
• always be honest and kind;
• it’s what is inside that counts;
• you don’t always know best – listen to and learn from others;
• Life is short – make the most of every minute;
• take responsibility – life is what you make it;
• never give up – learn from your mistakes.