Its out of this newness of Life, that Faith, Hope and Love flow, and also by it we receive a New Understanding according to Spiritual Light, of which is necessary to receive the Truth fruitfully Matt 13:23
23 But he that received seed into the good ground is he that heareth the word, and understandeth it; which also beareth fruit, and bringeth forth, some an hundredfold, some sixty, some thirty.
Now this is key because of one word here " understandeth" its the greek word syniēmi and means:
I.to set or bring together
A.in a hostile sense, of combatants
II.to put (as it were) the perception with the thing perceived
A.to set or join together in the mind
i.i.e. to understand: the man of understanding
ii.idiom for: a good and upright man (having the knowledge of those things which pertain to salvation)
But this understanding man does not have by nature, this we know by Rom 3:11
There is none that understandeth, there is none that seeketh after God.
Its the same greek word as in Matt 13:23, and here Paul under the inspiration of the Spirit writes that there are NONE that understandeth !
So its quite reasonable to conclude that the ones understanding the Word of Salvation in Matt 13:23 must have Newness of Life, thats why its also said that one has a good heart.
Also by nature the understanding is darkened to the Truths of God Eph 4:18
Having the understanding darkened, being alienated from the life of God through the ignorance that is in them, because of the blindness of their heart:
This is a symptom of being dead spiritually or alienated from the life of God, but when we receive that newness of Life, we are given a New Understanding because of Christ's coming into the world 1 Jn 5:20
And we know that the Son of God is come, and hath given us an understanding, that we may know him that is true, and we are in him that is true, even in his Son Jesus Christ. This is the true God, and eternal life.
The giving us an understanding is the fruit of His coming, and so is the Newness of Life !844