"...according to the eternal purpose which He accomplished in Christ Jesus our Lord..." (Ephesians 3:11; NKJV)
God worked our His eternal purpose in time. The eternal purpose of God was accomplished in Christ Jesus our Lord. Thanks to Him "we have boldness and access with confidence through faith in Him" (Ephesians 3:12; NKJV).
Don't lose heart (Ephesians 3:13). Pray with boldness (Ephesians 3:12). Rejoice in the the Lord Jesus (Ephesians 3:11).