When Jesus talks about a Man - he is talking about himself.
It is not the things of this world that can bring us back to God.
In verse 44 Jesus gave up everything to redeem us.
Hebrews 12:2 fixing our eyes on Jesus, the pioneer and perfecter of faith. For the joy set before him he endured the cross, scorning its shame, and sat down at the right hand of the throne of God.
Colossians 2:3 in whom are hidden all the treasures of wisdom and knowledge.
The treasure is the church.
Merchant - describe as buyer but here it is also Jesus who planted the good seed.
1 John 5:11-12 And this is the testimony: God has given us eternal life, and this life is in his Son. Whoever has the Son has life; whoever does not have the Son of God does not have life.
If you have the Son - Jesus, you will have the Life.
Another interpretation of the merchant = A true christians is a spiritual merchant who seeks for this fine pearls - word of God, that will make you happy and give up everything.
What are the things we need to learn?
We need to receive God's message and seek God. Remember the song of Kari Jobe - "the more I seek you, the more I find you, the more I find you, The more I love you".
If we are the merchant and Christ will be the pearl then salvation will be our effort which is wrong, because salvation comes through Christ. Pearls - is plural not singular (God) and so we are the pearls we should not find Jesus but He is there for us to receive and He will redeem us.
And now for the parable of the net, this was related to the parables of the weeds. This is how we will be in the end of the age. The judgement day.