Sincerity (from sincerus, "without wax ;" honey separated from the wax, perfectly pure). In Scripture sincere (ἄδολος, εἱλικρινής) signifies pure, without mixture. Sincerity is opposed to double-mindedness, or deceit, when the sentiments of the heart are contrary to the language of the lips. Paul (Php 1:10) would have the Philippians to be pure, their behavior innocent, free from offense, "that ye may be sincere and without offense till the day of Christ." Peter (2Pe 3:1) exhorts the pure, sincere mind of the faithful. Paul speaks (1Co 5:8) of sincerity and truth, or of purity and truth, in opposition to the leavened bread of iniquity. He reproaches the false apostles with not preaching Jesus Christ sincerely, purely, with upright and disinterested sentiments (Php 1:15). The reader is referred to a discussion of this subject by Guruall, Christian Armor, 2, 121-148.
The Cyclopedia of Biblical, Theological, and Ecclesiastical Literature was edited by John McClintock and James Strong. It contains nearly 50,000 articles pertaining to Biblical and other religious literature, people, creeds, etc. It is a fantastic research tool for broad Christian study.
John McClintock was born October 27, 1814 in Philadelphia to Irish immigrants, John and Martha McClintock. He began as a clerk in his father's store, and then became a bookkeeper in the Methodist Book Concern in New York. Here he converted to Methodism and considered joining the ministry. McClintock entered the University of Pennsylvania in 1832 and graduated with high honors three years later. Subsequently, he was awarded a doctorate of divinity degree from the same institution in 1848.WikipediaRead More