It is proven that self-love leads to success because self-love:
1) makes one motivated;
2) gives confidence to make good decisions;
3) helps overcome failures;
4) leads to better relationships;
5) helps deal with stress better and leads to better health.
https://www.psychologytoday.com/blog/feeling-it/201602/the-hard-data-self-love-why-it-leads-success