The biggest Swiss Army knife would never fit in your pocket.  It is 9″ wide and weighs 2 pounds.  It has 141 different tools folded up in it, including a hook dis-gorger and a snap shackle.  If you bought it, you might have more room in your pocket though, because it lists for $2100.  I suppose this thing is a joke, but before it went to seed, the idea of having one tool with which you could do most things was attractive.

Paul lists a bunch of new behaviors for followers of Jesus to put into practice:

Therefore, as God’s chosen people, holy and dearly loved, clothe yourselves with compassion, kindness, humility, gentleness and patience. Bear with each other and forgive whatever grievances you may have against one another. Forgive as the Lord forgave you.   –  (Colossians 3:12-14a (NIV)) 
That’s quite a list – a nice list, to be sure – but a lot to remember.  And, even at that, it is not comprehensive; it doesn’t include everything for us with which to “clothe ourselves”.   However, there is a “Swiss Army Knife” of attitudes for Christians, one tool for most circumstances.  Here’s the rest of what Paul wrote:

And over all these virtues put on love, which binds them all together in perfect unity.  –  (Colossians 3:14b)

If you understand that love is an act of will with which I put away my self-interest to minister to what you need, all of the attitudes listed in the first passage really are bound together under the one tool called love.  Better yet, you will discover that “Love” fits in your pocket.  It’s not free however; it costs you, maybe even more than $2100 in some circumstances.  But it is a great tool, worth much more than the biggest Swiss Army Knife.