What is the first requirement of getting returns in investing?

Whether SIP has a better IRR than lump-sum investing or not is an academic question. Those of us who have a monthly salary does not have the option of investing a lump sum. It is important not to get tempted to do something else with that amount.

from Wealth-Economic Times https://economictimes.indiatimes.com/wealth/invest/what-is-the-first-requirement-of-getting-returns-in-investing/articleshow/78716840.cms