"Many are in danger of thinking that in the cares of labor, in writing and practicing as physicians, or performing the duties of the various departments, they are excusable if they lay down prayer, neglect the Sabbath, and neglect religious service. Sacred things are thus brought down to meet their convenience, while duties, denials, and crosses are left untouched. Neither physicians nor helpers should attempt to perform their work without taking time to pray. God would be the helper of all who profess to love Him, if they would come to Him in faith and, with a sense of their own weakness, crave His power. When they separate from God, their wisdom will be found to be foolishness. When they are small in their own eyes and lean heavily upon their God, then He will be the arm of their power, and success will attend their efforts; but when they allow the mind to be diverted from God, then Satan comes in and controls the thoughts and perverts the judgment. 4T 560.1"
"And he spake a parable unto them to this end, that men ought always to pray, and not to faint;"
Both passages emphasize the importance of consistent prayer and reliance on God, even amidst busy lives.
None are in greater danger than he who feels that his mountain standeth sure. It is then that his feet will begin to slide. Temptations will come, one after another, and so imperceptible will be their influence upon the life and character, that, unless kept by divine power, he will be corrupted by the spirit of the world and will fail to carry out the purpose of God. All that man has, God has given him, and he who improves his abilities to God's glory will be an instrument to do good; but we can no more live a religious life without constant prayer and the performance of religious duties than we can have physical strength without partaking of temporal food. We must daily sit down at God's table. We must receive strength from the living Vine, if we are nourished. 4T 560.2 The course which some have pursued, in using worldly policy to accomplish their purposes, is not in harmony with the will of God. They see evils which need correcting, but they do not wish to bring down reproach upon t…
"Wherefore let him that thinketh he standeth take heed lest he fall."
The EGW passage directly echoes the warning against overconfidence found in 1 Corinthians 10:12, elaborating on the dangers of feeling secure and the potential for a fall. The connection is clear and meaningful.