Probably first time I learned importance of Drishti ( gazing point ) when I started Driving. My instructor told me to look in front and I did not pay attention. Suddenly I started going sideways as I was looking in to that direction. Then I tried it few times and found out Car was going where I was looking without me changing anything physically on the straight road. Hence put your Drishti where your path is.
This psych applies so well in yoga as you can hold poses like Garudasan for longer if you fix your gaze at one spot. You feel at ease in your pose when you are following the rule book of Drishti.