faith(-ful), truth

“Faith (πίστις)” From Concise Bible Dictionary:

This is a kindred word to “believe,” and indeed the two cannot be separated. In the O. T. the word “faith” occurs but twice (Deut. 32:20; Hab. 2:4). The words are emun, emunah; but aman is often translated “to believe.” The first time this occurs in the O. T. is when it is said of Abraham that "he believed in the Lord, and he counted it to him for righteousness" (Gen. 15:6). This is referred to in Romans 4 where the faith of the believer is counted for righteousness, and the conclusion is drawn that if any believe on Him that raised up Jesus the Lord from the dead, righteousness will be reckoned to them.
This may be called saving faith. It is confidence in God founded of His word; it is believing in a person, as Abraham believed God. "He that believeth on the Son hath everlasting life" (John 3:36). There is no virtue or merit in the faith itself; but it links the soul with the infinite God. Faith is indeed the gift of God (Eph. 2:8). Salvation is on the principle of faith in contrast to works under the law (Rom. 10:9). But true faith is manifested by good works. If a man says he has faith, it is reasonable to say to him, "Show me thy faith" by thy works (James 2:14-26). Otherwise, if the faith does not manifest itself, it is described as “dead,” and is altogether different from real, active belief. A mental assent to what is stated, as a mere matter of history, is not faith. A natural man can believe such things: "the devils also believe and tremble," but true faith gives joy and peace.
There is also the power and action of faith in the Christian's walk: "we walk by faith; not by sight" (2 Cor. 5:7). We see such faith exemplified in the lives of the Old Testament saints; as given in Hebrews 11. The Lord had often to rebuke His disciples for their want of faith in their daily walk. The believer should have faith in the living God concerning all the details of his daily life.
THE FAITH is at times referred to in the sense of “the truth;” that which has been recorded, and which the Christian has believed, to the saving of his soul. For this the Christian should contend earnestly; for it is fundamental; and many false prophets are gone into the world, and have even crept into association with the saints unawares (Jude 3).

“Truth” From Concise Bible Dictionary:

Throughout the scriptures there is that which God designates as “the truth.” It is divine, and above the opinions of men, however wise and pious they may be. In the Old Testament the admonition is given, “Buy the truth and sell it not” (Prov. 23:23). “The truth” must refer to God, who is true, but is not called “the truth:” hence it comprises all that may be known of God, whether declared by creation or made known by revelation. Truth is not simply that which is held as dogma, but must be received in the soul. Paul asked the Galatians who had hindered them that they should not obey “the truth?” (Gal. 5:7). Judgment is coming upon Christendom “because they received not the love of the truth that they might be saved” (2 Thess. 2:10). Truth is the real way of liberty: “the truth shall make you free” (John 8:32,36). Truth cannot be separated from the Lord Jesus, who is “the way, the truth, and the life.” This is objectively; subjectively the Spirit is the truth as having come from the glorified Christ. In the three Epistles of John “the truth” is constantly referred to, and a Christian woman is warned not to receive any one into her house, nor wish him God-speed unless he holds the doctrines taught by the apostles—in other words, “the truth.”

Strong’s Dictionary of Hebrew Words:

Transliteration:
’emuwn
Phonic:
ay-moon’
Meaning:
from 539; established, i.e. (figuratively) trusty; also (abstractly) trustworthiness
KJV Usage:
faith(-ful), truth