Being judgmental is easy: you just criticize everybody and everything that you don’t agree with. Being gullible is easy, too: you just accept everybody and everything. But Jesus doesn’t want us to slide into either ditch; He wants us to be be discerning without being judgemental. And we can only do this with the help of the Holy Spirit Himself.
Even though our heavenly treasure won’t get ruined or stolen in heaven, that’s not the ultimate reason that we should store up our treasure there. According to Jesus, we need to store up our treasure in heaven, not on earth, because our hearts chase our treasure. “For where your treasure is, there your heart will be also” (Matthew 6:21).
Fasting and prayer are not easy. That’s why the hypocrites loved to show them off. But this passage shows us how this whole principle of “your best life later” applies to the spiritual disciplines. We embrace their difficulty, trusting in our Father's reward in the future.
The level of your obedience to Jesus' teaching is the level to which you believe His promises concerning rewards. “Trust and obey” always go together. If we trust His promises, we will be able to obey in secret. If we don’t believe, then we’ll go around begging for others to notice us.