Four times in his First Letter, St John speaks of confidence: twice about confidence when facing God’s judgement (2:28; 4:17) and twice concerning confidence in prayer (3:21; 5:14). The whole Letter is clearly meant to be an encouragement for Christians to foster a deeper spiritual life and to do so with confidence. Thus, in different ways it stresses the importance of certainty, and hence of confidence, for the fostering of our spiritual lives. Thus John is quite certain of the efficacy of our prayers, for “whatever we ask we shall receive at God’s hands.” The reason for this certainty is closely linked with the moral life which is an indispensable aspect of the life of faith and an inalienable foundation for a Christian spiritual life: “we are keeping his commandments and doing what it pleasing in his sight.”

Keeping God's commandments does not mean a legalistic attitude to the spiritual life: keeping the commandments is nothing other than remaining in God and being a dwelling place for God, as John goes on to point out. Prayer demands an intimate relationship with God while at the same time fostering that relationship through giving us the strength and wisdom to do always what is pleasing to the Father.