Resources come from outside sources like customers or investors which is the sum of all financial metrics of an organization.
Will in contrast is intangible and is harder to measure.When we talk about Will we talk about Human Metrics e.g. feelings with which people come to work.
Short term oriented finite minded leaders try to focus on the more tangible factor i.e. Resources to meet their targets even if it is at the cost of people i.e. layoffs.
On the other hand an infinite minded visionary leader , bets on Will by taking requisite risks , motivates this and hence gets results in the long term in a very sustainable manner.
Adopted from Simon Sinek’s book The Infinite Game