In my lifetime of walking with the Lord, I have met many weak Christians and a few mature ones. The latter always catch me off guard, so humble are they that it’s sometimes easy to miss them. I would like to think of myself among the latter but I have to live with myself and know better. So I keep praying for wisdom.
In general weak Christians fall somewhere between two extremes: those who carry their doctrine into the world in order to preach it or those who leave their doctrine at home in order to conceal it. The first group tend to be legalists and the second group antinomians.
The legalists take their doctrine and shove it in people’s faces, much like the Pharisees. So the biology professor who is a legalist will continually enter into disputations about creationism versus evolution, and make sure that everyone knows how doctrinally pure he is. He professes his doctrine but notably fails to live it. He keeps to the letter of the law and doesn’t live up to its spirit.
The antinomians take their doctrine and keep it closeted in the private sphere, so that their dealings in the world are indistinguishable from those of non-Christians. They compartmentalize their lives to such an extent that they freely transgress and justify their worldly-mindedness by claiming freedom from the law.
What both categories of weak Christians share is a distrust of God and a high degree of trust in themselves. The legalists are performance-based, trusting in their own works not God’s work on the cross and through the Spirit in them. The antinomians rely on their own partaking of the grace of God through the cross to complacently forego their reverence of His law in every aspect of their lives.
Neither one places her full confidence in God. And by so doing they fail to trust in Him at all. The Gospel is a tool or a plaything, to be used at will, not a way of life. One eye is on Christ Jesus, the other on circumstances.
A mature Christian is not so double-minded. She has relaxed her claim to herself, and committed herself wholly as a “living sacrifice” to her God and Savior. There is no holding back of anything. And she brings nothing but herself to the Cross to which she clings. And in her life “now these three remain: faith, hope and love. But the greatest of these is love” (1 Cor. 13:13).