The person heard the word with joy.
Received it immediately with Joy, yes! But even so, had no root.
Matthew 13:5-6 KJV
5) Some fell upon stony places, where they had not much earth: and forthwith they sprung up, because they had no deepness of earth:
6) And when the sun was up, they were scorched; and because they had no root, they withered away.
Matthew 13:20-21 KJV
20) But he that received the seed into stony places, the same is he that heareth the word, and anon with joy receiveth it;
21) Yet hath he not root in himself, but dureth for a while: for when tribulation or persecution ariseth because of the word, by and by he is offended.
Compare to,
Matthew 13:23 KJV
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.
In the one, there is no root. In the other, the Word, the seed, bears fruit.
1 Peter 1:23 KJV
23) Being born again, not of corruptible seed, but of incorruptible, by the word of God, which liveth and abideth for ever.
And,
1 Peter 1:6-7 KJV
6) Wherein ye greatly rejoice, though now for a season, if need be, ye are in heaviness through manifold temptations:
7) That the trial of your faith, being much more precious than of gold that perisheth, though it be tried with fire, might be found unto praise and honour and glory at the appearing of Jesus Christ:
The trial of your faith, you this is "proving", the proving of your faith . . . might be found unto praise and honor and glory.
We receive the implanted Word, which lives and remains forever, and when we are tested, we are proven.
Manufacture a steel bar, and test it to show it's hardness. Testing it will not make it harder or softer, it will only show the hardness.
Much love!