My Musings – To seek first means to give priority (something given or meriting attention before competing alternatives). Immediately prior to this verse, Jesus was talking about the things of this life that people give attention to – food, shelter, clothing. Things that most would consider necessities, although there are still way too many that lack all of these in sufficient quantity (if at all) to not be considered in want. Others have much more than they need. Few are content with what they have. But no matter what category one falls into, Jesus insists that there is something much more important – our relationship with our Creator.
Our life here on earth is fleeting (a mere mist of vapor) and of little consequence when compared to all of eternity before us. But what we do with Christ while here on earth has tremendous consequences in terms of what eternity will be for us. The lack of the so-called necessities of this life will pale in comparison to an eternal separation from God in the torment of Hell (as politically incorrect as it is to even mention such a thing) if we never get our priorities straight while here. Likewise, the accumulation of things in this this life will be soon forgotten if the face of such suffering. Whether a life of abundance or want, all need Christ. If you seek Him, He (and His Kingdom and Righteousness) will be found. In His Kingdom, all these things will be given as well.
My Advice – Seek Him (Christ) while He may be found, because He came to seek (and to save) you. This is not me speaking in arrogance, although many will still believe so. It is me speaking in compassion to those who do not have a relationship with Christ. Because once upon a time, I was there as well.