Rabbi Daniel Lapin teaches that the root of the Hebrew word for faith (emunah) is a picture of the glue-making process: taking an animal (aleph) hide and soaking it in water (mem) to make a glue (nun = peg), so faith, like glue-making, involves a sacrifice — the sacrifice of whatever in us is pagan.
What does that look like? In Temple-less Judaism, it is constructed on the “Three Ts” — teshuvah (repentance), tefillah (prayer), and tzedeqah (righteousness, i.e. ministry to others). Judaism would agree with Ya’aqov (James) in his “faith without works is dead” teaching. These three Ts are the fruit that genuine faith produces.