Everyone has deficiencies. Everyone has flaws. Sometimes, our deficiencies and flaws keep us from achieving and growing, and this can be frustrating. God knows that we are not whole, and His vision for us is to obtain a wholeness through our relationship with Him and our relationship with others.
The word that the Bible uses to communicate the concept of wholeness is shalom, and when we receive a measure of shalom then we benefit by also receiving its fruits such as peace, contentment, safety, harmony, and health/welfare. Further, as we are made whole, we are better able to surmount and overcome some challenges of life that we were previously unable to reach.
In the latter part of Song of Songs, we see a contrast between two pursuits of unity and peace. In the past, Solomon had pursued unrighteous relationships with a harem of women in order to establish peace with surrounding nations. But, in so doing, his disobedience destroyed the relationship he had with God and ultimately destroyed everything for which he had worked. But now, he writes about a pure and godly relationship with the Shulamite. It is relationship like one that brings about wholeness or shalom, and he is able to better achieve the positive things of life.