What is the difference between general call and effectual call?

The general call of the gospel is made to all people, inviting them to repent and believe, as seen in passages like Matthew 11:28 and Isaiah 55:1. However, this call can be, and often is, rejected due to the sinful nature of humanity. In contrast, the effectual call is specific to those whom God has chosen and effectively brings them to faith. As stated in Acts 2:39, 'For the promise is unto you, and to your children, and to all that are afar off, even as many as the Lord our God shall call.' This indicates that while the general call is widespread and universal, only those whom God desires to save will experience the saving power of the gospel through the effectual call.