Start with your feet: only action can succeed. Metaphorically, the success of things is gradually accumulated from small to large.

Stop at your heart: when your inner thoughts are cut off, it is difficult to continue.

If it's feelings, I think it means that you like her because of a certain meeting, a certain place or something (like love at first sight), but your reason tells you not to continue, so you don't love her. Just like or appreciate.