The law of sowing and reaping is still in effect. This law may hold the answers to struggles in your life. Because, "Whatsoever a man soweth, that shall he also reap." We have the Word of God on it. You can choose to receive blessings or curses through this law of sowing and reaping. It's a matter of choice.
Are your words too weak and powerless to effect long term changes in others? There's a reason. There's a solution. The Bible talks about resurrection, the power that can raise someone from the dead. Have you experienced that power?