1 John 5:14-15 This is the confidence we have before Him that if we ask anything according to HIS will, He hears us. And if we know that He hears us in whatever we ask, we know we have the requests which we have asked of Him.
All of 1st John focuses on living in love and not living in sin & idolatry. Love and loving our brother IS His will, so our requests of Him need to line up with that. If we are just asking for things that serve ourselves or our love of things and money (for their own sake), then we need to rethink our motives.
Since it is His good pleasure for us to live according to His will, it is also His pleasure to fulfill our requests.
Lord, teach me to love. Empower me by your Holy Spirit to love the unlovable.