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Et sic de similibus references:

A solid basis in fact is at the root of all truth and a true man of wisdom has spent many years of effort diligently gleaning many gold nuggets of knowledge from many fields.
Colossians 1
8 Who also declared unto us your love in the Spirit.
9 For this cause we also, since the day we heard it, do not cease to pray for you, and to desire that ye might be filled with the knowledge of his will in all wisdom and spiritual understanding;
10 That ye might walk worthy of the Lord unto all pleasing, being fruitful in every good work, and increasing in the knowledge of God;

With all your getting, get wisdom.
Proverbs 4
7 Wisdom is the principal thing; therefore get wisdom: and with all thy getting get understanding.

Be willing to spend days or even weeks of digging into the gold fields of knowledge to discover a precious nugget of truth.
2 Timothy 2
15 Study to shew thyself approved unto God, a workman that needeth not to be ashamed, rightly dividing the word of truth.

To be able to recognize real gold when he sees it is a talent a good prospector definitely needs.
A prospector who can not recognize real gold when he sees it will no doubt return foolishly rejoicing with a bag full of worthless stones.
1 Corinthians 2
13 Which things also we speak, not in the words which man's wisdom teacheth, but which the Holy Ghost teacheth; comparing spiritual things with spiritual.
14 But the natural man receiveth not the things of the Spirit of God: for they are foolishness unto him: neither can he know them, because they are spiritually discerned.
15 But he that is spiritual judgeth all things, yet he himself is judged of no man.

It is not easy to find nuggets of pure gold.
Romans 11
33 O the depth of the riches both of the wisdom and knowledge of God! how unsearchable are his judgments, and his ways past finding out!

A good prospector knows he much search long and hard to find the precious nuggets of pure gold for which he seeks. Likewise, a man of true wisdom must be willing to labor as long as it takes to find the precious nuggets of pure truth that for which he seeks.
Revelation 3
18 I counsel thee to buy of me gold tried in the fire, that thou mayest be rich; and white raiment, that thou mayest be clothed, and that the shame of thy nakedness do not appear; and anoint thine eyes with eyesalve, that thou mayest see.