What Role Do God's Command's Play in My Life?

Matthew 6:25 "Therefore, I tell you, don't worry about your life -- what you will eat or drink; or about your body -- what you will wear. Isn't life more than food and the body more than clothing?"

merimna (care, anxiety) - mérimna (see 3307 /merízō, "divide") – properly, a part, separated from the whole; (figuratively) worry (anxiety), dividing and fracturing a person's being into parts. See 3309 (merimnaō).  (http://strongsnumbers.com/greek/3308.htm)
     We're talking about literally being divided or distracted. What causes me to be divided or distracted? So many things.
     What causes me to be made whole? Understanding with conviction. Being convinced, and walking it out.
     I see division when I see 5 different tabs open on my internet screen researching one topic, trying to pull me in 5 different directions. Let God's Word Be True.

     So now the question on my heart is, What role do God's commands play in our life?

Matthew 5

17 "Don't think that I have come to abolish the Torah or the Prophets. I have come not to abolish but to complete.  (accomplish, complete, fulfill)
From pleres; to make replete, i.e. (literally) to cram (a net), level up (a hollow), or (figuratively) to furnish (or imbue, diffuse, influence), satisfy, execute (an office), finish (a period or task), verify (or coincide with a prediction), etc. -- accomplish, X after, (be) complete, end, expire, fill (up), fulfil, (be, make) full (come), fully preach, perfect, supply.     http://strongsnumbers.com/greek/4137.htm

18 Yes indeed! I tell you that until heaven and earth pass away, not so much as a yud or a stroke will pass from the Torah -- not until everything that must happen has happened. 19 So whoever disobeys the least of these mitzvot and teaches others to do so will be called the least in the Kingdom of Heaven. But whoever obeys them and so teaches will be called great in the Kingdom of Heaven.   So if the Law is fulfilled, why does it matter if we disobey it?   20 For I tell you that unless your righteousness is far greater than that of the Torah-teachers and P'rushim, you will certainly not enter the Kingdom of Heaven! 21 "You have heard that our fathers were told, `Do not murder,'l and that anyone who commits murder will be subject to judgment. 22 But I tell you that anyone who nurses anger against his brother will be subject to judgment; that whoever calls his brother, `You good-for-nothing!' will be brought before the Sanhedrin; that whoever says, `Fool!' incurs the penalty of burning in the fire of Gei-Hinnom!  And, it seems like it's becoming even harder to literally obey it!  Matthew 13  Just as the weeds are collected and burned up in the fire, so will it be at the end of the age. 41 The Son of Man will send forth his angels, and they will collect out of his Kingdom all the things that cause people to sin and all the people who are far from Torah;  (other translations say "who practice lawlessness".)  42 and they will throw them into the fiery furnace, where people will wail and grind their teeth. 43 Then the righteous will shine forth like the sun in the Kingdom of their Father. Whoever has ears, let him hear!       This is very interesting to investigate. Until I hear otherwise (that's sort of a joke), I remain steadfastly considering that Jesus, Yeshua, completely filled the law, and did not diminish or abolish it.