In answer to a student's question, Rabbi Taub explains that whatever source one relies on for sustenance will appear to have that power even though the truth is that only G-d is in charge.
There are those that trust in other people, mistakenly believing that this will grant them security. Trusting in G-d means that we don’t need to rely on others. We are meant to love other people, not put our hope in them. By trusting only in G-d we are free to actually bond with people in a genuine way, without emotional manipulation, because we don’t rely on them or fear them.