WALK. More than a dozen Hebrew and Greek verbs are translated “walk.” Used hundreds of times, the meaning is generally literal but often figurative (e.g., Ps.1.1). In the NT Letters the word is used uniformly in the figurative sense and refers to the whole manner of life and conduct (Rom.4.12; 2Cor.6.16; 1John.1.7) or to the observance of laws or customs (Acts.21.21 kjv).
International Standard Bible Encyclopedia (1915)
Aside from its frequent occurrence in the usual sense, the word "walk" is used figuratively of conduct and of spiritual states. (1) Observance of laws or customs: "Thou teachest all the Jews who are among the Gentiles to forsake Moses, telling them not to circumcise their children, neither to walk after the customs" (Ac 21:21). (2) Of the spiritual life: "If we walk in the light, as he is in the light" (1Joh 1:7); "That like as Christ was raised from the dead through the glory of the Father, so we also might walk in newness of life" (Ro 6:4); "Walk by the Spirit, and ye shall not fulfill the lust of the flesh" (Ga 5:16); "For we walk by faith, not by sight" (2Co 5:7).