A right heart is a heart which BELIEVES ON CHRIST ALONE for salvation, and in which Christ dwells by faith (Rom. 10:10; Eph. 3:17). It rests all its hopes of pardon and eternal life on Christ’s atonement, Christ’s mediation, and Christ’s intercession. It is sprinkled in Christ’s blood from an evil conscience (Heb. 10:22). It turns to Christ as the compass-needle turns to the north. It looks to Christ for daily peace, mercy, and grace—as the sun-flower looks to the sun. It feeds on Christ for its daily sustenance, as Israel fed on the manna in the wilderness. It sees in Christ a special fitness to supply all its needs and requirements. It leans on Him, hangs on Him, builds on Him, cleaves to Him, as its physician, guardian, husband, and friend.

Romans 10

10 For with the heart one believes unto righteousness, and with the mouth confession is made unto salvation. -nkjv

10 For with the heart man believeth unto righteousness; and with the mouth confession is made unto salvation. -kjv

10 for with the heart a person believes, resulting in righteousness, and with the mouth he confesses, resulting in salvation. -nsab

10 For it is with your heart that you believe and are justified, and it is with your mouth that you profess your faith and are saved. -niv

Ephesians 3

17 that Christ may dwell in your hearts through faith; that you, being rooted and grounded in love, -nkjv

17 That Christ may dwell in your hearts by faith; that ye, being rooted and grounded in love, -kjv

17 so that Christ may dwell in your hearts through faith; and that you, being rooted and grounded in love, -nasb

17 so that Christ may dwell in your hearts through faith. And I pray that you, being rooted and established in love, -niv

Hebrews 10

22 let us draw near with a true heart in full assurance of faith, having our hearts sprinkled from an evil conscience and our bodies washed with pure water. -nkjv

22 Let us draw near with a true heart in full assurance of faith, having our hearts sprinkled from an evil conscience, and our bodies washed with pure water. -kjv

22 let’s approach God with a sincere heart in full assurance of faith, having our hearts sprinkled clean from an evil conscience and our bodies washed with pure water. -nasb

22 let us draw near to God with a sincere heart and with the full assurance that faith brings, having our hearts sprinkled to cleanse us from a guilty conscience and having our bodies washed with pure water. -niv

source: www.jcryle.info