Rav Eliezer Dovid Friedman zt”l (quoted in Sefer M’Pi Sefarim V’Sofrim) related that a chasid once came to Rav Uri of Strelisk zy”a to ask for advice regarding how he could come to a level of true ahavas Hashem.
Rav Uri replied, "Ahavas Yisroel leads to ahavas Hashem. My advice to you is to keep a book of matches in your pocket at all times so that you can give one to anyone who needs one. By showing love to your fellow Jews in this way, you will come to love Hashem."