(Pro 28:25 KJV) He that is of a proud heart stirreth up strife: but he that putteth his trust in the LORD shall be made fat.
Notice that the KJV says we will be “made fat” (1878) while the NASB has “prosper”. The KJV says literally what the Hebrew says while the NASB tries to adjust to our culture where being fat is a bad thing. Modern Americans don’t understand that historically being fat was a sign of wealth. Most people worked long hours on a subsistence diet. All you need to do to get this point is to look at their art and its ideas of beauty.
So fat is good. To get the point here you might think about the roles fat has in the human body. It stores up energy for times of need. It insulates from cold. It cushions the bones. If you think about it those are good things that could be applied spiritually.
So? Don’t go on a trust diet in the sense of limiting trust but do so by focusing on it. Allow God to energize, insulate and cushion you on the road of life.