Believers are called to spread the gospel message by sowing seeds of the word of God in the garden of the lives of the people God has entrusted them to live among. The responsibility only includes passing on the truth of the word. It does not mean ensuring the truth is received. We are not to shove the seed into the ground and hover over it waiting for fruit to manifest. In other words, we are to merely speak the truth and trust God with the results of our labor.
Based on what phase of life a person is in, the word sown may have different impacts. Some may be totally unphased, others too overwhelmed with the cares of life to receive the fullness of truth, while there may yet be those whose lives are completely changed by the word sown (Mark 1:1-34). Either way, it is no concern of the sower.
In the kingdom of God, there is one who sows, one who nurtures the seed, and only God can cause the seed to bring forth fruits (1 Corinthians 3:6-8). The sower is called merely to scatter the seeds. They will land where they may. Do not be discouraged when you do not see fruit from your labor. Your reward will be in heaven. Just keep sowing seed.
~Dawn L Klauman