How do we know that salvation comes from calling upon the Lord?

The assurance that salvation comes from calling upon the Lord is deeply rooted in Scripture, particularly in Romans 10:9-10, where Paul explains that if one confesses Jesus as Lord and believes in their heart that God raised Him from the dead, they will be saved. This highlights the relational aspect of salvation, requiring both a verbal acknowledgment and inward belief. The act of calling upon the Lord is intrinsically linked to recognizing one's need for salvation and coming in faith to the one who can save. When we call upon the name of the Lord, we demonstrate faith in Jesus Christ, who is the only means of salvation, fulfilling the promise that all who call upon Him will be delivered.