Deuteronomy 4:39-40
Know therefore this day, and consider it in thine heart, that the Lord he is God in heaven above, and upon the earth beneath: there is none else. Thou shalt keep therefore his statutes, and his commandments, which I command thee this day, that it may go well with thee, and with thy children after thee, and that thou mayest prolong thy days upon the earth, which the Lord thy God giveth thee, for ever.
The Lord is God in Heaven above, and upon the earth beneath. There is no conflict between the visible and the invisible. Both are united in their submission to Him. There is no tension between the material and the immaterial. Both bow to God. There is no one else. There is not God the Father in His invisible heavens and then someone else as god of the visible earth.
Since there is only one God and He rules over absolutely everything, we should keep His statutes and His commandments. He knows what is where we are and where He is. He understands all aspects of day to day life and eternal life. There is no place where He is not relevant. There is no detail outside of His control or notice.
If we do what He says, it will go well for us, and for our children after us. Our kids will grow up watching their parents do the word that they hear. They will be blessed in seeing faith lived out and this will fuel their conquest of the future. The future is Christian.