To him who is able to keep you from stumbling and to present you before his glorious presence without fault and with great joy –
NIV
Now to Him Who is able to keep you without stumbling or slipping or falling, and to present [you] unblemished (blameless and faultless) before the presence of His glory in triumphant joy and exultation [with unspeakable, ecstatic delight]--
AMP
Now unto him that is able to keep you from falling, and to present you faultless before the presence of his glory with exceeding joy,
KJV