Maintaining close relationships with God is essential for the life of a believer, because it is through constant communication with Him that a person receives the vital strength and grace necessary for true spiritual life.

The Light of Faith: Spiritual Strength Through Divine Communion

Maintaining close relationships with God is essential for the life of a believer, because it is through constant communication with Him that a person receives the vital strength and grace necessary for true spiritual life. Such a connection not only strengthens faith but also instills a determination in the soul to act in accordance with God's will. When a person's spirit is filled with grace, they acquire an unbreakable inner strength and steadfastness that helps to counter any temptations and overcome external trials.

For example, as stated in one of the sources:
"Spiritual life is the power to act spiritually, or according to God's will. This power is lost to man; therefore, until it is granted back to him, he cannot live spiritually, no matter how much he intends to. That is why the outpouring of the gracious power into the soul of the believer is essential for a truly Christian life. Truly Christian life is a life marked by grace. Man is elevated to a holy resolve; but for him to be able to act according to it, grace must accompany his spirit." (source: link txt)

This quote makes it clear that it is intimate communion with God that awakens a sacred determination within a person, enabling not only the pursuit of high moral ideals but also action in alignment with God's truth. It is the sole source that fills the believer's heart with living faith, making them capable of overcoming their own weaknesses.

It is also important to note that constantly being in God's presence helps the believer maintain mental clarity and a calm soul. The analogy of open windows, where light fills a room, illustrates that when the entire soul is directed towards the Lord, it fills with joy and inner light, and any distraction merely diminishes that brightness:
"When we are with the Lord, then the Lord is with us. And everything is filled with light. In a room, when all the windows are open and the sun shines, it becomes very bright. But if one window is closed, it gets darker, and when all are closed, it becomes completely dark." (source: link txt)

Thus, a close relationship with God not only reinforces faith but also develops an unwavering inner determination. This determination is expressed in the constant striving to live according to God's will, to feel His presence, and to prevent any external or internal circumstances from diverting the believer from the truth. It is through the recognition of one's spiritual dependence on the Lord, through repentance and continuous communication with Him, that a person is filled with the strength for worthy service and the confident overcoming of life's challenges.

Supporting citation(s):
"Spiritual life is the power to act spiritually, or according to God's will. This power is lost to man; therefore, until it is granted back to him, he cannot live spiritually, no matter how much he intends to. That is why the outpouring of the gracious power into the soul of the believer is essential for a truly Christian life. Truly Christian life is a life marked by grace. Man is elevated to a holy resolve; but for him to be able to act according to it, grace must accompany his spirit." (source: link txt)

"When we are with the Lord, then the Lord is with us. And everything is filled with light. In a room, when all the windows are open and the sun shines, it becomes very bright. But if one window is closed, it gets darker, and when all are closed, it becomes completely dark." (source: link txt)

These quotes emphasize that it is through intimate communion with God that the believer acquires the necessary spiritual strength and determination, making his life filled with joy, light, and genuine faith.