True trust in God's care is experienced through two distinct forms of protection. There is the visible rescue from immediate threats and the hidden shield that keeps harm at bay before it even arrives. Recognizing this dual layer of safety naturally gives birth to a constant outpouring of gratitude and joy.
The primary approach among commentators is that God serves as a safe shelter, a place where a person can find refuge under His wings [רש״י, ביאור שטיינזלץ, המאירי]. In times of vulnerability, a person prays to be guarded against the fear of enemies, sudden disasters, or the distress of physical illness [רש״י, מצודת דוד, אבן עזרא]. Even when an individual is enduring punishment for past wrongs, they still plead for God's rescue, asking that He never abandon them to their enemies [רד״ק].
Alongside this physical safety exists a hidden, spiritual layer of defense. Often, a miracle remains entirely unseen. Instead of saving a person from a visible threat, God steps in early to remove the danger from their path. Because the threat never materializes, the person remains completely unaware of the miracle that just occurred [אלשיך]. On this spiritual level, the enemy is understood as the evil inclination. A person begs God for protection from sin, asking Him to stop the evil inclination from causing them to stumble before the temptation even arises [אלשיך, חומת אנך].
In response to such profound rescue, the natural reaction is a burst of joyful singing and shouts of gratitude. The primary approach among commentators is that these songs of rescue now surround the individual, completely replacing the enemies that once encircled them [רד״ק]. Because hardships often serve to cleanse a person of their sins and eventually pass, every time a trouble fades away, a fresh song of rescue is awakened. This cycle leaves the person constantly wrapped in gratitude [מצודת דוד]. Offering a different perspective, some suggest that the voices surrounding and helping to deliver the person are actually the voices of angels [אבן עזרא].
On a deeper level, these joyful songs of rescue refer to the Torah itself, which is often described as a song. The Torah acts as an enveloping light that helps a person escape harm, shields them from the evil inclination, and brings forgiveness for their sins. Its protective power is so immense that it guards a person continuously, even during the times they are not actively engaged in studying it [חומת אנך]. Ultimately, this cycle of rescue and praise is eternal. The gratitude, the memory of these miracles, and the singing for God's protection will continue forever [המאירי].