Thank you.
St Paul was quoting from the law there.
So let us look at it in context, shall we?
to see what Paul was speaking about.
And the Lord thy God will make thee plenteous in every work of thine hand,
in the fruit of thy body, and in the fruit of thy cattle, and in the fruit of thy land, for good:
for the Lord will again rejoice over thee for good, as He rejoiced over thy fathers:
If thou shalt hearken unto the voice of the Lord thy God,
to keep His commandments and His statutes which are written in this book of the law,
and if thou turn unto the Lord thy God with all thine heart, and with all thy soul.
For this commandment which I command thee this day, it is not hidden from thee, neither is it far off.
It is not in heaven, that thou shouldest say, Who shall go up for us to heaven, and bring it unto us, that we may hear it, and do it?
Neither is it beyond the sea, that thou shouldest say, Who shall go over the sea for us, and bring it unto us, that we may hear it, and do it?
But the word is very nigh unto thee, in thy mouth, and in thy heart, that thou mayest do it.
See, I have set before thee this day life and good, and death and evil;
In that I command thee this day to love the Lord thy God,
to walk in His ways, and to keep His commandments and His statutes and His judgments, that thou mayest live and multiply:
and the Lord thy God shall bless thee in the land whither thou goest to possess it.
Deuteronomy 30:9-16
He that hath My commandments, and keepeth them, he it is that loveth Me:
and he that loveth Me shall be loved of My Father,
and I will love him, and will manifest Myself to him.
John 14:21