It implies that we have been adopted in the blood of the Lamb. It implies to us that He is our perfect Father who knows all our needs, who possesses perfect wisdom, who is committed to our good, who cares for us and desires to bless us more than we desire to be blessed. Come in childlike confidence. Come before the Father in the assurance that as the Father has purchased you in Christ He will bless you in the fullness of Christ. Prayer is not a luxury.
Prayer is a necessity.
Exactly because it is to come before our Father in secret it means that it is the source of our strength. Think of Christ. In the days of His flesh, He poured out His soul to God in secret. And His Father rewarded Him openly. I am not asking you if your prayers are perfect.