"Moshe said, 'This is the thing that Hashem commanded you to do; then the glory of Hashem will appear to you." (Vayikra, 9:6)
The Torah is talking about all the different offerings that the Kohen must bring to Hashem. The book of Vayikra (Leviticus) carefully discusses all the kinds of sacrifices and offerings. If we follow Hashem's instructions carefully His glory will appear to us, BE"H.
The Torah Treasury suggests yet another interpretation, if you change the punctuation of the sentence in Hebrew. "Vayomer Moshe (and Moshe said), zeh hadvar asher tziva Hashem (this is the thing that Hashem commanded), t'asu (Do!!), v'yeira aleichem Kavod Hashem (and the glory will appear to you)."
If we want to see G-d's glory, we must do! We must live a life of action, of making good things happen, of doing something to try to make a difference, of doing and engaging in positive pursuits. It is incumbent on each person to try to make the world better than when he found it. A person must do/act to help others. If we do (even if we don't complete the task, even if we don't succeed), then we have the potential of seeing Hashem's glory.
Any act done with good motivations behind it (whether it succeeds or not) is worthy. In this case, Nike is right. "Just do it."