There's and old traditional saying that I've heard over the years that states, "It's not good to be so heavenly minded that you're no earthly good. Heaven's response to that would be, "It's not good to be so earthly minded that you're no heavenly good."
Heavenly minded people are wrapped up in things that God does from Heaven. Earthly minded people are wrapped up in what's going on down here on Earth. That could be the problems of life, money pressures, repercussions from drug or alcohol use, sensuality, dirty living, sickness, domestic relationships gone sour, associations with the world, the pleasures of life, dining, gambling, concerts, or any of these.
These adverse conditions of life are things that can keep the child of God wrapped up and tangled up so much...they lose sight of heavenly matters. Sometimes to an extent of losing faith, throwing in the towel on Chirst, getting so frustrated that they go out and get drunk or doped up and begin blaming people. That very blame game turns into a place of blaming God. They get bitter turn their back on God and get taken over by sin and dirty living. They become so "earthly" or "carnal" they are no heavenly good. Earthly matters will take over your life and your walk with Christ if you let them. Earthly is a Biblical expression that relates to the carnal man.
James 3:15...This wisdom descendeth not from above, but is earthly, sensual, devilish.
You may find this hard to believe but there is no such thing as "carnal christian". Christians walk in the Spirit, not in the flesh. The Bible says the carnal mind is an emnity against God.
Rom 8:7...Because the carnal mind is enmity against God: for it is not subject to the law of God, neither indeed can be.
The carnal mind is an expression of the mental state of the Adamic nature. The flesh is the physical expression of the Adamic nature.
Gal 5:16...Walk in the Spirit, and ye shall not fulfil the lust of the flesh.
All that written to say one thing, "Don't be to earthly minded that you can't be in heavenly good." I like what the Apostle Paul said about earth dwellers in the following...
Col 3:1-2... If ye then be risen with Christ, seek those things which are above, where Christ sitteth on the right hand of God. Set your affection on things above, not on things on the earth.