Do you have to shout publicly to call on the Lord and be saved?

Les teaches that calling on the Lord does not require shouting to a crowd or from a housetop. It can be done privately in a prayer closet, while driving down the road, or washing dishes over the sink. The person verbally says, 'Lord I'm a sinner, save me, because I believe that You've done everything that needs to be done.' That is what verse 13 means. Les gives the illustration of a lifeguard who, despite noise and distractions, is trained to hear a feeble cry for help and immediately responds. In the same way, God is constantly listening for the feeble call of a sinner who says, 'I want to be saved,' and the second He hears it, He is there. That is what salvation is all about.