Paul is reminding the Corinthians of the blessings that come from giving generously and cheerfully, and he is encouraging them to give with the confidence that God will bless them in return.
The passage is saying that God will bless those who give, multiplying their resources and increasing the harvest of their righteousness. It is saying that giving will enrich them in every way, allowing them to be generous in every way, and that their giving will produce thanksgiving to God.
The passage continues to be relevant for Christians today, reminding us of the blessings that come from giving generously and cheerfully. It encourages us to trust in God's provision and to be confident that as we give, our resources will be multiplied and we will be enriched in every way. The passage also reminds us that our giving should bring thanksgiving to God, as we acknowledge that all that we have and all that we are comes from him.
2 Corinthians 9:10-11. May he who supplies seed to the sower and bread for food, supply and multiply your seed for sowing, and increase the fruits of your righteousness; you being enriched in everything to all liberality, which produces through us thanksgiving to God.