What would you do for a friend? Your best friend? Would you make them promises and fail to keep them? Most people would do much for their friends but find it impossible to do as much for themselves. Fact is the best friend you'll ever have is yourself and it follows therefore that if you love yourself you need to be kind to your body. Use not anything [drugs or substances] that will be harmful to it. Having any difficulty fighting your addictions? Make promises to your best friend [yourself] and honor them — it's the greatest test of one's integrity and I believe such an approach could be useful to some people who don't know how they'll fight their addictions [and win].