I cant see any evidence in the fact that Jesus was talking to only his followers on the sermon on the mount. Do you know any? Even if He was, there are Christians who die of starvation anyway, so it doesn't really make much sense! I think it's clear Jesus wasn't talking about spiritual food and clothing (In Matt 6) so the rest is more of a digression.In Matt. Chapter 5 v. 14 he says "Ye (you all) are the light of the world..." Then He continues along the same thought line and says "Let your light so shine before men, that they may see your good works, and glorify your Father which is in heaven (v. 16)" You would have to argue that an unsaved person can be the "Light of the World" the "Salt of the earth" and that they are a "Child of God". The last one, I think, would be the hardest. 1 John 3:10 "In this the children of God are manifest, and the children of the devil: whosoever doeth not righteousness is not of God, neither he that loveth not his brother."Galatians 3:26 "For ye are all the children of God by faith in Christ Jesus."As for Matt 6 being spiritual things, instead of physical... My personal interpretation is that it is mostly talking about physical things because of Matthew 6:25 "Therefore I say unto you, Take no thought for your life, what ye shall eat, or what ye shall drink; nor yet for your body, what ye shall put on. Is not the life more than meat, and the body than raiment?" and because it ends with Matthew 6:32 (For after all these things do the Gentiles seek:) for your heavenly Father knoweth that ye have need of all these things. But seek ye first the kingdom of God, and his righteousness; and all these things shall be added unto you."It says the gentiles seek after these things, and that we are not to worry about them. We are to seek after Spiritual things. If God was talking about Spiritual things, then He wouldnt command us elsewhere to hunger after spiritual things (ex, the beatitudes). Right here, he tells us NOT to seek the things He is talking about, but in contrast to seek after the Kingdom of God and His righteousness. Anyway, those are just my thoughts.Love in Christ,and keep seeking Him alone,Joe