1 John 3:20 For if our heart condemn us, God is greater than our heart, and knoweth all things.
21 Beloved, if our heart condemn us not, then have we confidence toward God.
22 And whatsoever we ask, we receive of him, because we keep his commandments, and do those things that are pleasing in his sight.
These verses start off by telling us that sometimes we may sometimes have doubts. This is when God is at His best to justify us even when would condemn ourselves. He sees not only our actions but also the motives and intentions behind them. Next we see when a Christian recognizes in his life the manifestation of love in deeds and actions, it results in confidence about his relationship with God. When we have this confidence and know the benefits of sharing the love of God and keeping His commandments we can ask anything of Him and He will answer. Since love is the heart of obedience to the law, its presence in a life evidences submission to God which He blesses by answered prayers. We just always need to remember to try and live a life pleasing to God