"“He that is faithful in that which is least is faithful also in much.” Luke 16:10 . The importance of the little things is often underrated because they are small; but they supply much of the actual discipline of life. There are really no nonessentials in the Christian's life. Our character building will be full of peril while we underrate the importance of the little things. COL 356.1"
"He that is faithful in that which is least is faithful also in much: and he that is unjust in the least is unjust also in much."
Ellen White directly references Luke 16:10 in this passage.
"“He that is unjust in the least is unjust also in much.” By unfaithfulness in even the smallest duties, man robs his Maker of the service which is His due. This unfaithfulness reacts upon himself. He fails of gaining the grace, the power, the force of character, which may be received through an unreserved surrender to God. Living apart from Christ he is subject to Satan's temptations, and he makes mistakes in his work for the Master. Because he is not guided by right principles in little things, he fails to obey God in the great matters which he regards as his special work. The defects cherished in dealing with life's minor details pass into more important affairs. He acts on the principles to which he has accustomed himself. Thus actions repeated form habits, habits form character, and by the character our destiny for time and for eternity is decided. COL 356.2"
"He that is faithful in that which is least is faithful also in much: and he that is unjust in the least is unjust also in much."
EGW directly quotes Luke 16:10 and expands upon its meaning.